第二节 根据括号内的汉语提示，用句末括号内的英语单词完成句子。（共10小题；每小题1.5分，满分15分）
31. It’s no wonder that you are scolded; you were out enjoying yourself when you ___________ (应该学习). (ought)
32. _______(虽然他聪明)，he doesn’t put his heart into his research. (as)
33.The students are working very hard ________________________ (不辜负) their parents’ expectations. (live)
